CN1430827A - Optical transponder - Google Patents

Abstract

A dual E/O transmitter module optical transponder comprising an O/E receiver module capable of converting an ingressing optical signal from an optical signal source to an electrical signal, a pair of E/O transmitter modules connected in parallel and each capable of converting said electrical signal to an egressing optical signal, a control device for enabling one of said pair of E/O transmitter modules and disabling the other of said pair of E/O transmitter modules and an optical coupler coupled to said pair of E/O transmitter modules for feeding said egressing optical signal from said enabled E/O transmitter module to an optical signal destination.

Description

Optical transponder

Invention field

The invention belongs to the field of optical transponder.

Background of invention

Optical ring network comprises two optical fiber, and one is used for inserting and telling service aisle, and another is used to protect passage.The optics loop network generally includes one or more so-called unidirectional optical transponders; be used for light signal joined on the service aisle or from it and tell light signal; so-called 1 * 2 direction of insertion (add direction) optical transponder is used for the light signal that some are identical and is added on this service aisle and the protection passage, and so-called 2 * 1 minutes outgoing direction (drop direction) optical transponders be used for from this service aisle maybe this protection passage tell light signal.

Summary of the invention

According to the present invention, provide a pair of E/O transmitter module optical transponder, comprising:

(a) O/E receiver module can will be transformed into the signal of telecommunication from the light signal that optical signal source enters;

(b) the E/O transmitter module of a pair of parallel connection, the every light signal that the described signal of telecommunication can both be transformed into output;

(c) control device is used for starting in the described a pair of E/O module one and forbid in the described a pair of E/O module another; And

(d) optical coupler is coupled with described a pair of E/O transmitter module, is used for the light signal that the E/O transmitter module from described startup comes out is fed to the destination of light signal.

The present invention proposes a novel scheme, even when device fails, also can solve the problem that data are ended by the traditional unidirectional or branch outgoing direction optical transponder that only has a single E/O transmitter module.

The accompanying drawing summary

In order to understand the present invention and to see how in fact it may finish, introduce some preferred embodiments now just only by some nonrestrictive examples, and by accompanying drawing, wherein identical parts are marked with identical numbering, and described accompanying drawing is as follows:

Fig. 1 is the schematic diagram of the unidirectional optical transponder of two E/O transmitter modules;

Fig. 2 is the schematic diagram of the branch outgoing direction optical transponder of two E/O transmitter modules.

Accompanying drawing describes in detail

Fig. 1 represents the unidirectional optical transponder 10 of a pair of E/O transmitter module, comprise one with photoelectricity (O/E) receiver module 11 of optical signal source (not shown) coupling; Field programmable gate array (FPGA) control device 12; Electric shunt 13; Electrical selector 14 (formation switch element); Main path 16, this main path extend between this splitter 13 and this selector 14 and have a clock and data recovery (CDR) unit 17, demodulation multiplexer 18, forward error correction (FEC) and Performance Detection (PM) unit 19 and a multiplexer 21; Extend bypass footpath 22 (the constituting) between splitter 13 and the selector 14 by electric shunt; Second electric shunt 23; The E/O transmitter module 24 and 26 of a pair of parallel connection, and one and the optical coupler 27 of the destination (not shown) coupling of light signal.

This O/E receiver module 11 is transformed into the signal of telecommunication with the light signal that enters, and when detecting less than light signal thereon, provides a light signal to lose (LOS) signal to this FPGA control device 12.This splitter 13 splits into two identical signals with the signal of telecommunication from this O/E receiver module 11, is fed to this main path 16 and this bypass footpath 22 respectively.The clock and data recovery on the signal of telecommunication is finished in this CDR unit 17, and is detecting less than data-signal, just detect by continuous 0 form stream the time, provide a data-signal to lose (LOS) signal to this FPGA control unit 11.Forward error correction and the Performance Detection to the signal of telecommunication finished in this FEC and PM unit 19, and provides data-signal to lose (LOS) signal to this FPGA control device 12 according to circumstances, LOF (LOF) signal, signal fail (sf) signal, and Signal Degrade (SD) signal.This selector 14 can arrive splitter 23 with the electrical signals from one of main path 16 or bypass footpath 22, and this will be by the SX signal deciding from this FPGA control device 12.This splitter 23 is divided into two identical signals with this signal of telecommunication, is fed to this E/O transmitter module 24 and 26 respectively.This E/O transmitter module 24 and 26 can be independently by the TX_EN signal enabling from this FPGA control device 12, and each E/O transmitter module can both be transformed into the signal of telecommunication light signal of output, is fed to this optical coupler 27.When this E/O transmitter module 24 and 26 was activated but does not detect light signal thereon, they just provided TX_LOS signal to this FPGA control device 12.

In the default mode of operation of optical transponder 10, this FPGA control unit 12 switches this selector 23, so that the electrical signals from main path 16 is arrived this E/O transmitter module 24, and forbids this E/O transmitter module 26.In the situation of TX_LOS_1 signal from E/O transmitter module 24, it is under an embargo, this then startup of E/O transmitter module 26.Prevent that with E/O transmitter module 26 protection of the equipment fault of E/O transmitter module 24 is influenced by the regioselective of this selector 23.

Though the present invention describes the embodiment of Finite Number, should know that the present invention can carry out a lot of variations in the claim scope of appendix, improve and other application.For example, this pair E/O transmitter module optical transponder is particularly suitable for as dividing the outgoing direction optical transponder 30 (referring to Fig. 2)

Claims (2)

1. two E/O transmitter module optical transponder comprises:

(a) O/E receiver module can will be transformed into the signal of telecommunication from the light signal that optical signal source enters;

(b) the E/O transmitter module of a pair of parallel connection, each can both be transformed into the described signal of telecommunication light signal of output;

(c) control device is used for starting in the described a pair of E/O transmitter module one and forbid in the described a pair of E/O module another;

(d) coupler that is coupled with described a pair of E/O transmitter module is used for the light signal that the E/O transmitter module from described startup comes out is fed to the destination of light signal.

2. the transponder according to claim 1 also comprises the 2nd O/E receiver module, is used for that second light signal is transformed into second signal of telecommunication and switch element is used for one of described signal of telecommunication is switched on the E/O transmitter module of described startup.